netlabel_user.c

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/*
 * NetLabel NETLINK Interface
 *
 * This file defines the NETLINK interface for the NetLabel system.  The
 * NetLabel system manages static and dynamic label mappings for network
 * protocols such as CIPSO and RIPSO.
 *
 * Author: Paul Moore <[email protected]>
 *
 */

/*
 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
 *
 * This program is free software;  you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY;  without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 * the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program;  if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#include <linux/init.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/socket.h>
#include <linux/audit.h>
#include <linux/tty.h>
#include <linux/security.h>
#include <linux/gfp.h>
#include <net/sock.h>
#include <net/netlink.h>
#include <net/genetlink.h>
#include <net/netlabel.h>
#include <asm/bug.h>

#include "netlabel_mgmt.h"
#include "netlabel_unlabeled.h"
#include "netlabel_cipso_v4.h"
#include "netlabel_user.h"

/*
 * NetLabel NETLINK Setup Functions
 */

int __init netlbl_netlink_init(void)
{
    int ret_val;

    ret_val = netlbl_mgmt_genl_init();
    if (ret_val != 0)
        return ret_val;

    ret_val = netlbl_cipsov4_genl_init();
    if (ret_val != 0)
        return ret_val;

    ret_val = netlbl_unlabel_genl_init();
    if (ret_val != 0)
        return ret_val;

    return 0;
}

/*
 * NetLabel Audit Functions
 */

struct audit_buffer *netlbl_audit_start_common(int type,
                           struct netlbl_audit *audit_info)
{
    struct audit_buffer *audit_buf;
    char *secctx;
    u32 secctx_len;

    if (audit_enabled == 0)
        return NULL;

    audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, type);
    if (audit_buf == NULL)
        return NULL;

    audit_log_format(audit_buf, "netlabel: auid=%u ses=%u",
             from_kuid(&init_user_ns, audit_info->loginuid),
             audit_info->sessionid);

    if (audit_info->secid != 0 &&
        security_secid_to_secctx(audit_info->secid,
                     &secctx,
                     &secctx_len) == 0) {
        audit_log_format(audit_buf, " subj=%s", secctx);
        security_release_secctx(secctx, secctx_len);
    }

    return audit_buf;
}